Photo: Roadside diner

Yellowstone National Park visitors congregated along a road to witness the rare treat of seeing five grizzly bears – a boar plus a sow and her three cubs – feeding on the carcass of a bison in mid-September 2013. To make the spectacle more interesting, five gray wolves also were regularly darting in and out to rip away chunks of meat. Despite a lot of growling, swatting and some chasing, all of the predators, plus numerous scavenging birds, took part in the feast over three days.